Spain Refuses to Extradite Ex-HSBC Employee

MADRID—A top Spanish court on Wednesday rejected Switzerland's request to extradite a former Swiss bank computer specialist who allegedly leaked confidential information about thousands of accounts to tax officials in several countries.

In declining to turn over Hervé Falciani, a former HSBC Holdings PLC bank computer engineer, to Swiss authorities, Spain's National Court said that Mr. Falciani's actions in copying and disseminating...